void showchar(char a, int b);
main(){
    showchar('a', 2);
}
void showchar(char a, int b){
    *(char far *)(0xb8000000 + 160 * 10 + 80) = a;
    *(char far *)(0xb8000000 + 160 * 10 + 81) = b;
}
